Answer:
A. factories, cropland
Explanation:
The point sources are identified as the sources of water pollution such as dirty drains and other sources of discharge. Factors and sewage treatment plants are sources of discharge and are the two most common points.find the zeros of the quadratic equation f(x)= 6x²-3, and verify the relation between its zeros and coefficients.
using the formula
alpha+beta= -b/a
alpha × beta = c/a
Answer:
Step-by-step explanation:
We are already given the following formulas :-
[tex]\blue{\alpha + \beta = \dfrac{-b}{a}}[/tex]
[tex]\red{\alpha \times \beta = \dfrac{c}{a}}[/tex]
Given that the polynomial is :-
[tex]\sf{6x^2 + 0x - 3}[/tex]
Now, we will use factorisation as our first weapon :-
6x² -3 = 0 [As we have to find the zeroes of the equation]
6x² = 3
x² = [tex]\dfrac{3}{6}[/tex]
x² = [tex]\dfrac{1}{2}[/tex]
x = [tex]\dfrac{1}{\sqrt{2}}[/tex]
Now, we can take one zero as 1/Root 2 and other -1/root 2
[tex]\dfrac{1}{\sqrt{2}} + \dfrac{-1}{\sqrt{2}} | \dfrac{0}{6} = 0[/tex]
0 |0 Hence verified.
[tex]\dfrac{1}{\sqrt{2}} \times \dfrac{-1}{\sqrt{2}} | \dfrac{-3}{6} = 0[/tex]
[tex]\dfrac{1}{2} | \dfrac{1}{2}[/tex]
Hence, proved.
I am so sorry to ask again but I suck at science and I rlly need help so could any one help me plzz and btw ty to jasminegomez18 for helping me with the other question I really appreciate thank you ! :)
Answer:
c) evaporating
d) has no salt in it
Explanation:
no problem anytime. just try to understand the concept and it will definitely help if you read the question more than once.
the change of state that is happening the surface of the sea water is evaporating. This is because it allows from liquid to vapour/ gas based on the diagram
the water in the test tube is different from sea water because it is pure meaning no salt. It's evident based on figure 2 because sea water is full of solutions and mixtures.
A thermometer reads a pressure of 120 kPa at 0 ˚C. What is the temperature when the thermometer reads a pressure of 80 kPa? (Celsius + 273 = Kelvin) Use Gay Lussac's Formula to solve. 182 K 192 K 202 K 212 K
Answer:
T₂ = 182 K
Explanation:
Given that,
Initial pressure, P₁ = 120 kPa
Initial temperature, T₁ = 0˚C = 273 K
We need to find the final temperature when the pressure is 80 kPa.
We know that, Gay Lussac's Formula is :
[tex]\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\\\\T_2=\dfrac{P_2T_1}{P_1}\\\\T_2=\dfrac{80\ kPa\times 273}{120\ kPa}\\\\T_2=182\ K[/tex]
So, the new temperature is equal to 182 K.
The velocity of sound in water is 350 m/s. If a wave eith a wavelength of 6 m travels water, at what frequency will it be traveling?
Answer: 1,480m/s
Explanation:
PLEASE ANSWER ASAP!!!!!!! 50 points if the answer is correct!
Vinegar is sold as a 5.00% (v/v) solution of acetic acid. How many mL of water are in a 455-mL bottle of vinegar? Round your answer to 3 significant figures. Please answer in mL
Please please only answer if you are sure the answer is correct. thank you so much
5
mL acetic acid
95
mL water
Explanation:
Since
5
%
of the vinegar, by volume, is acetic acid, and we have
100
mL of vinegar, we have
5
mL of vinegar.
Similarly, we have
100
%
−
5
%
=
95
%
being water, so we have
95
mL of water.
please answer quick please, im have a test
I need those problems answered please and thank you
Define the term salt
Answer:
Salt is any neutral chemical compound made of cations (positive ions) attached to anions (negative ions). The main kind of salt is sodium chloride with the chemical formula NaCl. It is formed when hydrochloric acid is added in sodium hydroxide.
How many moles are in 6.02 x 1023 particles of Carbon dioxide?
Answer:
There is one mole in 6.02*10^23 particles of anything ( also CO2)
help, please? will mark brainliest
Answer:
Sulfur would gain electrons
Explanation:
Atoms want to have a complete out valence shell and because sulfur only needs 2 more electrons to complete the outer shell it would take 2 more.
For the reaction C + 2H2 → CH4, how many grams of hydrogen are required to produce 8.7 moles of methane, CH4 ?
Answer:
[tex]from \: the \: equation : \\ 1 \: mole \: of \: methane \: is \: produced \: by \: 2 \: moles \: of \: hydrogen \\ 8.7 \: moles \: of \: methane \: will \: produce \: (8.7 \times 2) \: moles \\ = 17.4 \: moles \\ 1 \: mole \: of \: methane \: weighs \: 16 \: g \\ 17.4 \: moles \: will \: weigh \: (17.4 \times 16) \: g \\ = 278.4 \: g[/tex]
Magnesium reacts with Lead II Nitrate in a Single Displacement Reaction.
Show formula
Answer:
Mg(s) + Pb(NO3)2 (aq) → Mg(NO3)2 (aq) + Pb(s)
Explanation:
On which of the following objects will the earth exert a greater gravitational pull than on a baseball?
A. A pencil
B. A person
C. A plastic bag
D. A cat
Answer:
b.
Explanation: brainliest
-- A scientist combines 14 grams of potassium nitrate with an unknown amount of
potasslum chloride. If the total mass of the products is 27.6 grams, what was the
mass of the potassium chloride?
Cada
Answer:
The unknown amount of potassium chloride is 13.6 grams.
Explanation:
The reaction of 14 grams of KNO₃ with KCl produces a total mass of 27.6 grams of the products.
The law of conservation of mass tells us that the total mass of the reactants must be the same that the total mass of the products. So, we can find the mass of KCl as follows:
[tex] m_{r} = m_{p} [/tex]
Where r is for reactants and p is for products
[tex] m_{KNO_{3}} + m_{KCl} = m_{p} [/tex]
[tex] 14 g + m_{KCl} = 27.6 g [/tex]
[tex] m_{KCl} = 27.6 g - 14 g = 13.6 g [/tex]
Therefore, the unknown amount of potassium chloride is 13.6 grams.
I hope it helps you!
The equivalence point for a strong acid – strong base titration will occur at:
pH < 7
pH = 7
pH > 7
pH = 14
I believe the ans is (2) pH = 7.
Explanation:
At the equivalence point, the salt of strong acid and strong base is completely hydrolyzed which gives a neutral solution with pH 7 as H+ ion concentration is equal to OH- ion concentration.
How is primary selection different from secondary succession?
Answer:
Explanation:
Primary and secondary succession occur after both human and natural events that cause drastic change in the makeup of an area. Primary succession occurs in areas where there is no soil and secondary succession occurs in areas where there is soil.
In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area previously occupied by living things is disturbed—disrupted—then recolonized following the disturbance.
Hope this helped :)
-Akito
3CaCl2 + 2AlF3 --> 3CaF2 + 2AlCl3
How many moles of CaF2 will form from 36 moles of AlF3?
Answer:
54 moles
Explanation:
The ratio of AIF3 to CaF2 is, as seen in the equation, 2:3. This means you multiply 36 moles by 3, and then divide it by 2. This equals 54 moles of CaF2.
Who can help me with 4 questions of ixl about changes in gravitational potential energy
can u pls show a picture of it?
What is the molarity of a NaCl solution containing 9.0
moles of NaCl in 3.0 L of solution?
Answer:
3 M
Explanation:
Molarity equation: M = n/v
n = moles of solute
v = liters of solution
9 moles of NaCl / 3 L
9/3 = 3 M
How many mole of 88 gram of water
So I have an F in science, and everything is due today. Am I going to fail 9th grade because I didn't pass that class?
Answer:
i dk how ur school works, but you'll most likely have to take that science again to get the credits u need to graduate
Explanation:
In June, the most northern parts of earth get?
1. What did you notice about the distance between the atoms as the number of bonds increased? (Compare bond of H2S and H2O)
2. What is the relationship between atomic size and bond length for H2O / H2S and CO2 / CS2?
Answer:
Inverse relationship between number of covalent bonds and bond length.
Explanation:
There is inverse relationship between number of covalent bonds and bond length which means that if one increases the decreases or the one decreases the increases. When the number of covalent bonds between two atoms increases, the bond length decreases because there are more number of electrons present between the two nuclei, the two nuclei can get closer to each other until both nuclei experience their repulsive force of attraction. In bond of H2S has lower electronegativity value as compared to H2O so the bond length decreases due to attraction of shared pair of electrons by both nuclei.
What is catalyst? Write its types.
Answer:
A catalyst is a chemical substance that alters the rate of chemical reaction not consumed by the reaction. Hence, a catalyst can be recovered chen unchanged at the ends of chemical reaction. Catalyst can be divided into two typ the basis whether it speeds up or slowdowns the rate of chemical reaction. The positive catalyst and negative catalyst.
Answer:
A catalyst is a chemical substance thatalters therate of chemical reactions not consumed by the reactions.
what conditions would produce the highest pressure?
air that is cooling will cause the highest pressure
Explanation:
This is because heat has to escape a certain area and if the heat can't escape then more and more pressure will build up in a area.
2Fe2O3 + 3C 4Fe + 300,
When 9.20 moles of carbon dioxide are produced from the reaction above, how many moles of Iron(III) Oxide must have been present before the reaction took place?
Answer:
3.1 moles of Iron(III) Oxide
Explanation:
The equation of the reduction of iron III oxide using carbon is shown;
Fe2O3 + 3CO → 2Fe + 3CO2
From the reaction equation;
1 mole of Iron(III) Oxide yielded 3 moles of carbon dioxide
x moles of Iron(III) Oxide will yield 9.20 moles of carbon dioxide
x = 9.2 moles * 1 mole/3 moles
x = 3.1 moles of Iron(III) Oxide
_____ Ca(NO3)2 + _____ Fe → _____ Fe(NO3)3 + _____ Ca I need this done quick and fast Balancing chemical equations
Answer:
3, 2, 2,3
..........................
How many molecules are there in 122 grams of NO2?
Answer:
1.47 × 10^(23)
Explanation:
An unknown compound has the following chemical formula:
P4Sx
where x stands for a whole number.
Measurements also show that a certain sample of the unknown compound contains 2.9 mol of sulfur and 1.94 mol of phosphorus. Write the complete chemical formula for the unknown compound.
will give brainliest :]
Answer:
where the main questions of these assmesnt
Explanation:
Which is the best way to describe the biodiversity of an area?
O A grassland has organisms that live on hundreds of acres of land.
O A desert has 10 species of animals that can survive dry conditions.
O A rainforest has fertile soil that supports many kinds of plants.
O A pond has 12 species of organisms, including 300 animals and 40 plants.
Answer:
i just put a
Explanation:
Answer:
the answer is d, i got it on edge